Chuck-positioning device and drill guide for drilling machines



Dec. 4, 1928. 1,693,904

7 H. H. KNOTT CHUCK POSITIONING DEVICE AND DRILL GUIDE FOR DRILLING MACHINES Filed Jan. 6, 1927 v 2 Sheets-Sheet l mme J,

Dec; 4, 1928., v

x H. H. KNOTT CHUCK POSITIONING DEVICE AND DRILL GUIDE FOR DRILLING MACHINES Filed Jan. 6, 1927 2 Sheets-Sheet 2 Patented Dec. 4, 1928,

UNITED STATES- PA ENT OFFICE.)

HARRY- H. xnorr'r, or WASHINGTON, IOWA CHUCK-POSITIONING DEVICE AND DRILL GUIDE FOR DRILLING MACHINES.

Application filed January 6. 1927. Serial No 159,380.

The object of my invention is toprovide means for positioning a workholding chuck and for guiding a drill when drilling the work in the chuck and it is my purpose to provide such means of simple, durable and comparatively inexpensive construction.

More particularly it is my object to'provide V such positioning and guiding means for use on an automatic button drilling machine.

A further object is to provide a supporting disk having the chuck positioning devices and drill guides mounted thereon. it

Still a further object is to so mount the chuck positioning devices a that when the chucks engage them, the positioning devices will be moved slightly for exerting a spring tension against the chucks for securely hold-' ing them in position for the drill to operate on the work held in the chucks.

guidingmeansdetachably mounted on the positioning means whereby drill guides for different sized drills may be secured to the positioning devices.

Still a further object is to provide the positioning devices of resilient material and secure them to the disk at their inner ends. whereby their outer ends are free to be engaged by the chucks and moved by them.

A r'ru-ther object is to provide grooves in the disk in which the positioning devices are seated to prevent their being moved out of line with the chucks.

.Still a i'urther object is to provide for ad i5 justment ot' the disk toward or away from the chucks whereby chucks of various lengths may be provided for.

Still a further object is to, provide an aligning device for the supporting disk for in preventing the disk fromrotat-ing but allowing its longitudinal movement.

lVitlrthese and other ob'ects in view,

invention consists in the construction, ar

rangement and combination of the various I 15 parts of my chuck positioning device and drill guide for drilling machines, whereby the objects contemplated are attained, as hereinafter more fully setforth, pointed out my claims, and illustrated n the accompanying drawis) lugs, 1nwh1ch-z i Figure 1 1s a vertical sectional view through the drill head and chuck supporting shaft of a button drilling machine and illustrates one embodiment of my invention for positioning .55 the upper ends of'the work holding chucks and for guidingthedrills. 1 g

1 machine with one of Still a further object is to provide drill Figure 2 is a sectional View on the line 22 V of Figure 1 and illustrates a plan view of my invention as applied to the button drilling the positioning bars removed. r r

Figure 3 1s a perspective vlew-of the supporting disk for supporting the positioning i devices and drill guides of my'invention.

Figure 4 15 a PGISPGCUVG view of a pos tionmg bar. i

Figure 5 is an nverted perspective view of a drill guide.

Figure 6 is a sectional viewfon-the line Figure 11 is an enlarged cross sectional view through a button showinga drill in position to start drilling a hole in the button.

On the accompanying drawings I have used the reference numeral 10 to indicate a vertical shaft which is rotatably mounted at one end of a button drillingmachine and is driven bysuitable mechanism. The shaft 10 is rotatably mounted at its upper end in a bearing 12 and at its lower end in the driving gear casing 14;.

Secured to the shaft 10 is a drill headsupcomprises a shaft 20, drill chuck 22, drill24c tween the pulley 26 and the lower bearing'of the drill head 18. The pulley 26 issecuredto the shaft 20 and all the pulleys26 are driven by a belt 30. The spring 28 normally holds 1 the drill 24in raised position and a track 32 against which the upper end of the shaft 20. contacts has lowered portions 34 for moving the drill 2 1 downwardly. 2

A sleeve 36 is secured to theshaft 10 and porting member 16 having a plurality of drill heads 18 secured thereto. Each drill head 18 and pulley 26. A sprin'g'28 is interposed'be:

hasa pair of sprockets 38 for coacting with a pair otchains of peculiar construction.

a The chains referred'to consist of links 40 and 42-; There are two sets of these chains,

5 one above theother, and the upper and lower links 40 of the chains are connected by portions44. 1 V 1,.

bearin 46 encircling and thereby rot-atably' Both the upperand lower links 40' have supporting tubular shafts 48. The portions 50 of the bearings 46 engage in depressions 52 in the sprockets 38 siniilar to'the rollers of standard roller chains. Half bearing porportions 50 engage in the depressions 52. The

halt heari11gs54and 56 then comprise complete bearings for supporting and positioning the ends of the tubular'shafts 48. It

may liere be mentioned that there 'arelWo sets of sprocket Wheels 38 on a button drilling machine and the portions 44 i the links 40 merely act as carriers for maintain ingthe bearings 46 in proper relation to eachother for carrying the tubular shafts 48 as'they are transported from one set of the sprocket Wheels to the other set.

The tubular shafts 48 are providedwith pulley portions 58 and are rotated at proper times by a belt 60. -The' belt 60 r a spring ing the buttonsfor drilling;

Slidably mounted vi thin the-tubular shafts (not shown) isused to hold the tubular shafts 48 in the half bearings 56 for properly align- 48 are button holding" chueks comprising shafts 62split as at 64. The upper ends'ot the shafts 62 are recessed at 66 to receive a i as button blank A; A smaller recess 68 is formed in the upper end of each shaft 62. The upper end of the shaft 62- is tapered as indicated at 70 and is, received in a closing 4 flange 72 of the tubular shaft 48 so that the relativeto' the tubular shaft '48."

pose of this is forallowing the insertion of a 'no'partof mypresent invention.

four quarters of the shaft 62 may be spread when the shaft 62is 11loveddovvmvardly relative to the sleeve 48 or maybe brought together \vhen theshaft 62*is lHOVGCl upwardly buttonblank and for gripping the button blank. 'The mechanism for doingthis is not illustrated as it is but part of an ordinary;- automatic button Cll'lllll'lQ machine lower end of each 'shaft 62 is in contact with a ea-In track 74 havin raised )ort'ions 76 for nioving' the button chuck and tubular shaft 48qupwardly.

' In the operation of this machine the .tubular shafts48 are loosely and rotatably mount ed in 'the bearings46. When the tubular shafts 48 engage. in the halfbcaringsfiG. a

.Tconiparatively tightbearing, that is; one

Without play isprovided for-preventing any variation in the niovement o'f'theupper end of the sha ftl62' in which the button blank is 7 then moved toward the shaft 52 for drilling a holeiin, the button blank. Anyslightplay which develops in the bearings 46 and 56 Wlll held ior drilling purposes. The drill 24' is i The .pur-

and-forms and are secured to the disk adjacent their Cap screws 91. thr'eadedi nto allow the upper end of the shaft 62' to be thrown out of line thereby drilling the "hole through the button blank toone side of the position it should assume. Furthermore the button blank A is usually provided With a fish eye? 77- Which has a sloping bottom.- The drill 24 is caused to drill ahole. through th'ebuttonblank A1 at. one side of the center thereof and therefore on the slanting portion ofthe bottouiofthe-"fish eye 77. The drill therefore has a tendency to drift toward the center as it is comparativelysmall and there 1s cons derable distance between the drillina end of thedrill and the drill chuck 22. This drifting also has a tendency to bendand eventually break the drill 24 and any slight Wear in the drillhead or button chuck mechanism will cause the machine to dri-Hfitho button holes so far from their true position that they are unusable. h I:

'It may here' be mentioned that a hole is drilled at one side of the center ofthe button blank A. The button chuck is then turned a half turn for tu "ohole'bnttons and another hole drilledloff center for making two holes in the button spaced on 'either'side of the center. a

For four hole buttons, the chuck is-turned a fourth turn between "drilling operations and fourhole's drilled oil center.

'llhe foregoing description relates to a standard automatidbutton drilling and facing machine and forms no part of m in vention.

My present. invention consists of a sup- 1 porting disk 78 having a hub 80. The hub 80 fits over the supportingshaft 10." Thedisk' and hub are split longitudinallyand the hub 80 is formed with ears 82 whereby the halves of the diskmay be positioned on opposite sidesof the shaft 10 and securely clamped thereto means of bolts 84; In this manner it not necessary to disassemble any-part of the button drilling machine foriapplying my attachment thereto.

The disk 78 is formed With a plurality of circumferentially spaced grooves 86 extend-Y ing radially from the hub 80. Chnckpositioning bars 88 are seated int-he grooves 86 inner ends.

the disk, extend through slotted openings 90 y in thechuck positioning bars. v p v V y The outer ends of the chuck positioning bars are provided Withopenings 92having tapered portions 94. 'The chuck shafts are beveled as at 96 for coacting with the tapered portions 94 of theopenings The positioning bars '88 maybeadj usted in the grooves 86-by nanipulating'thesct screws 98*which' beat-against the "hub 80. There,

bars.

The-positioning bars areiormed of slightly resilient material'andnormally rest after the cap screws 91 ma be ltigihtened l to l niaintain'the ad ustn ent'ot the positioning on the bottoms of the grooves 86 unless otherwiseadjusted by means of the adjustable stop or set screw 100. In operation the disk 78 is positioned on'the shaft 10 so that the chuck shafts 62 when moved to their upper limit of movement will slightly raise the outer ends of the positioning bars 88 thereby securely positioning the upper ends 'of the button blank holding chucks. 1

Secured to the positioning bars 88 by cap screws 102 are drillguides 1.04. The cap screws 102 are'screwedinto threaded openings 103 in the bars 88. The drill guides .104: each comprise a plate having a boss 106 thereon substantially the same diameter as the opening 92 and designed to be receivedtherein.. In this manner the drill guides are re- .movable and can be replaced by-oth er drill guides.

Each drill guide 1041 is provided with a drill, guideoPening 108 substantially the" samediameter as the drill 24L; IVhen differentdrills 2% are used different drill guides 10lare secured to the positioning bars 88' and have drill guide openings corresponding to the drills used.

Adjacent the drill guide opening 108 is a larger opening 110 for inserting or remov-' ing the drill from the drill chuck 22. This is illustrated in Figure 10 and is desirable so that the drill 24 will not have to be inserted or removed through the smallopening 106 replacement of the the chucks 62 and to therefore prevent rotationof the disks 78 I have providedan aligning device comprising a collar 112 securedto the shaft 10. Anarm 11 1 extends from the collar 112 and has a dependingkey 116: 11

V notch 118 is provided in the disk.78 for re-.

ceiving the key. 116. By this arrangement.

rotation ofthe disk 78 vis prevented;

.I liav-cused my positioning device and drill guide quite extensively on a button drilling machine and find it very satisfactory. The

holes inthe button blanks A are all drilled uniformly and at their proper positions. No

drifting of the drill is encountered inasmuch as the drill guide is positioned very close to the button blank. Variations in the position of tllGCllLlClIS due to wear in the bearings 46 and 56 do not change the position of the work holding end of the button chucks as they are resiliently lieldiin' position due to their'bcveled ends engaging the tapered portions of the openings in the'positionin'g bars. Drills are not broken due to drifting and to wobbling of the buttonchuck. The drills furthermore can be used much longer without .resliarpening. drilling and facing machineyI ad uSt the upper half bearing 56 inwardlyabout one sixteenth of an'inch' and therefore leave the tubular shaft48 very loose inits upper bearing In applying my attachment to. a button i their bearings does not renderthem inaccurate because their upperends are positioned by the positioning ars 88. Thisis a considerable saving in the operation of a machine asreplacing allihalf bearings and tubular shaft-is considerably expensive. Mechanics for keeping the shafts 62 properly aligned by adjusting the bearings 56 are also dispensed with. Theuse of my attachment insures an accuracy in drilling buttons which is QSPQ'.

cially appreciated by manufacturers who have machines for sewing buttons on garments. Button holes out of line cause breakage of needles in such machines.

Although I have illustrated my nvention in connection with a button drilling machine 1 it is ObVlOUS that it'may be adapted to Cli.1.ll-'

ing machines of anycharacter wherein the chuck may be positioned. in a similar manner anda'guide on the positioning means may be provided for the drill.

I also do notwish to limit myself to a drilling machine as my device could be used with a guide designed to fit any. other type of cutter.

Some changes may be made'in the construction and arrangement of the various parts of my chuck positioning device and drill guide for drilling machines without departing from the realspirit and purpose of my in: vention, and it is my intention to cover by my claims any modified forms of structure or use O'f- 11100l12t1110t1l "equivalents which may be reasonably included within their scope.

I claim as my invention:

1. In combination with a drillin machine having a reciprocably mounted chuck and a reciprocably mounted drilh a positioning and. guide device therefor comprising a resilient' positioning bar rigidly secured at oneeiid and I having an opening. in the otherend thereof, 7 g i one end of said chuck being adapted to .en1

in said opening and move ,tlie free'end of said positioning bar along substantially the axis line of the chuck when it is moved to one of its positions wherebyv theichuck 'is se curely held in drilling position by said pos1- tioning'bar and due to the, resiliency thereof,

a guide plate adjacent said opening and an openinginsaid plate adapted to guide said drill when it is moved to one of its positions for. drilling 'work'held in thechuck. i

2. In'combination with a drilling machin having a reciprocably mounted chuck, the

; work holding end of which is loosely journaled, a positioning device therefor comprising a resilient positioning bar rigidly secured at one end and having an openin in the other cnd'thereof, the end of said chuc being adapted to engage in said opening andslight- ,ly move the free end of said positioningbar in substantial alignment withthe axis of the chuck, when the chuck is moved to one of its positions whereby thechuck is securely held in drillingpositiondue to the resiliency of said positioning bar.

3. In combination witha drilling machine having a reciprocably mounted chuck, and a reciprocably mounted drill, a positioning and guide device therefor comprising a resilient positioning bara tapered opening therein, the holding end of said chuck being loosely j ournaled andbeveled for engagement in'said to oneof its openin g when the chuck is moved to one of its positions whereby the chuck is securely held in drilling position due to the resiliency of said positioning bar, a guide plate adjacent said opening and an opening in said plate adapted to guide said drill when itis moved positions for drilling work held in the chuck. 1 t

4. A chuck positioning device and drill guide for drilling machines comprisinga chuck positioning bar for engaging the chuck ofthe machine, said bar havin a tapered opening, the work holding en said chuck'being tapered to engage in said opening when the chuck is moved to drilling position, a guide plate having a portion ex tending into said opening, said guide vplate being mounted for slidable movement .to-

ward each other, of a positioning device for said chuckscomprising a supporting disk secured to saidshaft, positioning bars secured to said plate and having openings in their outer ends for engaging said chucks when they'areimoved to drilling position whereby the chucks are positioned and means for guid ing said drillscomprising guide plates removably secured to said positioning bars and 'havingl openings therein for'guiding the drills whenthey aremoved to drilling position.' a a i 6. The combination with a drilling :ma-

:comprisingguide plates; removabl chine having a shaft for supportingcircum- V terentially arranged and' radially spaced drill heads and chucks, said drill heads and chucks being mountedfor slidable movement toward each other, a positioning device for said chucks comprising a supporting disk sei curcdto but capable of bein loosened and slid longitudinally'on said Slflft, an align ing meansfor said sup orting disk comprising an arm secured to said shaft,a key extendmg from said arm and parallel to said shaft,

a notch in said supporting disk for receiving saidkey whereby the disk may he slid longitudinally relativeto said shaft but will not rotate thereon, positioning bars secured to saidplate andihaving' open ngs in their outer ends for engaging said'chucks Whenthey'are moved to drill ng position whereby the chucks:

are positioned. a, a a I 7. The combination with a drilling m chine having a shaft for supporting circum ferentially arranged and radiall spaced drill heads and chucks, said drill'hea s and chucks being mountedfor slidable movement toward eachother, a positioning device for said chucks comprising a supporting disk) secured to said shaft, resilient positioning bars hav ing their inner ends secured to said plate and having openings' in their outer ends for engaging said chucks when they are moved to drilling position wherebythe chucks are positioned, said disk beingpositionedrelative to the chucks whereby said chucks, in

drilling position,'move the outerends of the positioning bars to thereby impose a spring tension for maintaining engagement between the positionin barsandthechucks. l a r.

8, The com ination with a drilling machine having a shaft for supportingcircuim ferentially arranged and radially "spaced drill heads and chucks, said drill heads and chucks being mountedfor slidable movement toward each other, a positioning device for said chucks comprising a supporting disk secured to said shaft, resilient positioning i bars having their inner ends secured to said plate and having openings in their outer ends for engaging said chucks when they are chucks, in drilling position, movetheouter ends of the positioning bars to thereby impose a' springtension for maintaining engage ment' between the posrtmnmgharsand the chucks, and means for guiding said drills secured to said positioning bars and'havmg openings therein for guiding the drills when they 3 are movedtodrilling ition -Des Moines, Iowa, c. 21,1926.

= H RBYH-KNO T" 11o moved todrilling position wherehythe chucks are positioned, said disk beingposit1oned relativ'eto the chucks whereby said 

